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甲醛由于沸点低又易溶于水

网址:www.chujiaquan58.com  2022-08-10  作者:admin    阅读:

甲醛由于沸点低又易溶于水,所以主要通过大气和水排放进入环境。生产甲醛的工厂其未处理的气体,当排放高度为18米时,其距工厂250-500米的大气样品中,甲醛含量均在0.035mg/m³以上。1000米远在大气中甲醛浓度在嗅阈以下。以甲醛作鞣剂生产塑料的企业周围大气中的甲醛浓度在嗅阈以下。以甲醛作鞣剂生产塑料的企业周围大气中的甲醛浓度距厂区100米内为0.012mg/m³;200米处36个样品中有15个浓度低于0.012mg/m³;400米处均低于0.012mg/m³。
3. Migration and Transformation: formaldehyde is mainly discharged into the environment through the atmosphere and water due to its low boiling point and easy solubility in water. When the emission height of the untreated gas in the factory producing formaldehyde is 18 meters, the formaldehyde content in the air sample 250-500 meters away from the factory is more than 0.035mg/m3. Formaldehyde concentration in the atmosphere is below the olfactory threshold. The concentration of formaldehyde in the air around the enterprises that use formaldehyde as tanning agent to produce plastics is below the olfactory threshold. The concentration of formaldehyde in the air around the enterprises that use formaldehyde as tanning agent to produce plastics is 0.012mg/m3 within 100m from the plant area; 15 of the 36 samples at 200m are less than 0.012mg/m3; and the concentration at 400m is less than 0.012mg/m3.
工业废水中排放的甲醛含量由于行业不同有很大差别,其中浓度最高的甲醛废水是生产酚醛树脂的上层焦油废水,含甲醛量高达2.5%。
The formaldehyde content of industrial wastewater varies greatly due to different industries, among which the highest concentration of formaldehyde wastewater is the upper tar wastewater producing phenolic resin, with the formaldehyde content up to 2.5

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